Fluid heater



Lzzos A. SUNDH FLUID HEATER Filed Apri'l z, 1921 Jan, 13.. 1925.

2 Sheets-Sheet 2 'Patented-Jan. 13, 1925.

UNITED STATES 1,522,603 PATENT OFFICE.

AUGUST SUNDH, OF YONKEBS, NEW YORK.

rLUin HEATER..

To all u1/wm it may concern:

Be it known that I, AUGUST SUNDH, a citizen of the United States, and a resident of Yonkers, county of Westchester, and State of New York, have invented certain new and useful Improvements in Fluid Heaters, of which-the following is a specification.

My invention relates to fluid heaters and partlcularly to heaters constructed and adapted for operation by electric current.

An object of my invention is to provide a Huid heater wherein the flow of fluid and the heating eiect will be interdependently controlled, a further object being to control the fluid iiow 'and the heating effect by a tilting of the heating device.

Another object of my invention is to provide a iiuid heating device in which the heating effect is obtained from electric current; a further object being. to' efficiently utilize alternating current in a iiuid heater.

Another object of my invention is to provide a iiuid heater in which a iuid heating element is heated by electric current induced therein, a further object being to form the secondary coil of the transformer of tubular electric and fluid oonductin material to constitute thed fluid heating e ement.

Another object of my invention Ais to pr vide a simple, com act and eiiicient fluid heating devicein wiiich the heating is vcarried on within an insulated chamber.

.Other and further objects of my invention l appear from the following description taken 1n connection with the accompanying Vdraw-- ings and will be pointed out inthe hereunto appended claims. e

In the drawings in which like reference characters indicate' similar'parts, Fig. 1 is a front elevation of a. fluid heating device embodyin my invention; Fig. 2 is a side view of t e construction shown in Fig. 1

" tu ular form and partly broken away; Fig. 3 is a vertical sectional view ofthe construction shown in Fig. 1; Fig. 4 is a sectional view on the line 4 4 of Fig. 3; and, Fig. 5 shows a modified form of a construction embodying my in.-

y vention. f My invention involves the heating'or iuid by e ec tric current and it also 'involves makan element heated by electric current in passingv the iuid therethrough. 'It also -involves the production of a flow of currentin the heating element by induction, particularly by utilizing the heating element as a secondary of a transformer,

the secondary being. preferabl short circuited electrically and, if desiredI being short circuited as to liow of Huid. In the latter case, the coil is provided with a supply at one point and a discharge at another point. In accomplishing these ends I provide a laminated magnetic circuit or transformer core 6 preferably comprising top, bottom and side members and a center' core 7 Asso ciated with and preferably encircling a portion of the magnetic circuit is a primary coil -8 intended to be energized by an alternating current so as to set u in the magnetic cir-V cuit an alternating ux. Aociated with the magnetic circuit is a fluid heat" v ment 9, preferably in the form of a coi and made of electrically conductive material. In order to simplify the construction and add to the ecienc of this heating element, it .may be made ofy tubing so that the fluid to be heated is brought into contact with 'it' by being passed through it. It will be apparent that whenv the primary coil is energized an electromotive force will be induced 1n the element 9 and in order to heat the element it is short circuited electrically by a member 10 connecting the ends of the coiled element '9. The same result is obtained in the construction shown in Fig. 5 wherein the heating element com rises the' parts 9 and 9 which are connecte together to form both an electric and uid short circuit, the Huid being led to and from the element respectively at different points by the tubes 11.

Surrounding the heating elements 9, as well as the primary coil 8 andthe magnetic circuit or core 6, isa casing comprisin the parts 12 and 13 which areV double-wall and there is maintained a vacuum in the spaces 14. A bracket or other suitable base 15 supports the heating device in the manner hereinafter described. A fluid supply pipe 16 leads to a passa e 17 passing through the bracket. Throug the end 15of the bracket (see Fig. 4) anopenin intersects the passage 17 and a base mem er 18 on which the .los

Gil

21. Suitable packing 22 seals the joint hetween the pin 19, the recessed ear 18 and the end 15 of the bracket for a purpose hereinafter made apparent. A tubular member 11 leads from one end of the element 9 to a passage 24: through the base 18 and a passage 25 leads from the recess 20 in the pm 19 so that fluid will pass from the passageI 17 to the heating element. when the device is tilted to the position shown in. F1g. 2 wherein the passa es 24 and 25 are in register or the fluid ow will be cut ofi when the device is tilted to the position shown in Fig. 3. The pivotal mounting of the dev ice therefore constitutes a fluid flow controlling means. From the other end of the heating element 9- a passage 26 leads to a discharge member 2?. l

In orde-r prevent overheating of the heating element is my intention that the primary coil 8 will not be energized except when fluid is acted upon by the heating element 9. My invention therefore contemplates simultanecus control of the source of heat and fluid and therefore interdependence of the respective controlling devices therefor. As a simple form of interdependent controlling devices I have shown a switch S for controlling the flow of current to the primary coil which is closed when the heating device is tilted to such a position that fluid will flow through the heating element. To this end, I provide flexible contacts 28 and 29 fastened upon the braclret 15 and insulated from one another and adapted to be flexed into contact hy the lug 30 of insulating material mounted upon one of the ears 18 at such time when the device is tilted to permit flow of fluid.. Stopmembcrs 31 act upon the bracket lo o limit the tilting of the device which is If desired, the flu insulated from the ff convenient manner pling member i6 thereof of insulating material.

While I have described the specific details of my invention it is to be understood that I do not limit myself to the speciic details but intend that my invention shall be defined' by the hereunto appended claims.

What I claim as new and desire to secure by Letters Patent is: l

1. As an attachment to the discharge member of a fluid system, a fluid heater comprising a tubular electric resistance element` means for supplying electric current said element'means for supplyinr uuid to said element, and means for cor r1 rig" said current inter-dependentiy new of fluid from said discharge menl" 2. In a fluic heater er electric resistance element, means siuiplyin electric current to said element a. pivote support for said clement, a fluid supply, and

means for controlling said current and fluid supplies and operated by movement of said element upon its pivot.

3. As an attachment to the discharge member of a fluid system, a fluid heater comprising an electrically inductive fluid conducting element and means for inducingl a current therein said means being inter-de` 'pendently controlled with the flow of fluid from said discharge member.

4:. As an attachmentv to the discharge member of a fluid system, a fluid heater comprising a primary coil, a secondary coil of tubular material, connected at one end with said discharge member means for supplying current to said primary coil and means for supplying fluid to said secondary coilA the heating effect of said secondary coil being inter-dependently controlled with the flow of fluid from said discharge member.

5. As an attachment to the discharge member of a fluid system, a fluid heater comprising a primary coil, a short-circuited secondary coil of fluid conducting material, means for supplying current tc said primary coil, and means for sup, ing fluid to said secondary coil at one poirl and withdrawing it through said discharga, member, the current supplied to said sec` ondary coil being inter-dependently cor trolled by the flow of fluid through said charge member.

6. As an attachment to the discharge member of a fluid system, a uid heater comprising a casing, a primary coil therein, 1 electric conductors leading into said casing for energizing said primary coil, an electric switch controlling the current passing through said conductors, a tubular iii ductive secondary coil Within said casina and means for conducting fluid into casing to one point of said secondary co and from another point oi said second coil out of said casing, said electric sunter lacing inter-dependently controlled hy t how of the fluid into said. conduct-i means 1-1s an attachment to the discharrH member of a Huid system, a Huid heater comprising a casing, a primary coil thereV in, electric conductors leading into said casing for energizing said primary coil, an electric switch controlling the current pass-- ing through said conductors, a tubular in ductive secondary coil Within said casing, and means for conducting fluid into said casing to one point of said secondary coil and from another point of said secondary coil out of said casing said secondary coil n n n e .f being electrically short-c1rcuited, sai elecu trolled 'tric switch being interdependently con by the floW of the fluid into said conducting means.

8. In a fluid heater, Aa fluid heating ele# ment, and a valve, having a plurality of members, for controlling flow of fluid, said element being supported on one of said members and another of said members being supported, whereby tilting of the heating element controls fluid flow.-

9. In a fluid heater, a :fluid heating element, a source of energy for heating saidv energy source.

10. In a iiuid heater, arpivoted fluid heatin element, said pivot comprising a iuid v ve, and means operated by movement of said element on its pivot for controlling the heating of said element.

4 11. In a fluid heater, a transformer having a secondary coil of tubular fluid-conducting material, and a casin for said transformer having double wa ls between which a Vacuum-is maintained, said casing having means for admitting and discharging the fluid to be heated.

12. In a fluid heater a heat insulated casing, a fluid element within the casing constituting a .secondary coil, and a source of electric current arranged to induce a our.- rent in said element whereby to heat the fluid therein.

In testimony whereof, I have signed `my name to this specification.

AUGUST SUNDH. 

